Location History:
- Norfolk, VA (US) (1996 - 1998)
- Chesapeake, VA (US) (2004)
Company Filing History:
1 out of 111 
3 out of 832,912 Years Active: 1996-2004
Title: The Innovative Contributions of Darrell L. Darrow
Introduction
Darrell L. Darrow is a notable inventor based in Norfolk, VA, who has made significant contributions to the field of concrete finishing and mixture separation. With a total of 4 patents to his name, Darrow's work showcases his commitment to advancing technology in construction and materials science.
Latest Patents
Darrow's latest patents include a method of finishing plastic concrete mixture and a method of separating constituent ingredients of mixtures by staged vibrational energy. The first patent describes a technique that utilizes a vibrating tool to consolidate a "dry shake" aggregate into the upper layer of concrete. This method enhances the finishability of concrete by allowing moisture to migrate to the surface, thereby hydrating the aggregates. The vibrations also ensure thorough consolidation, which helps prevent delamination. The second patent introduces a process where vibrational energy is applied to a liquid-solid work mixture at its natural resonant frequency. This innovative approach expedites the consolidation and drying of the solid portion while effectively isolating the constituent ingredients of the mixture.
Career Highlights
Throughout his career, Darrell has worked with various companies, including International Business Machines Corporation. His experience in the industry has allowed him to develop and refine his innovative techniques, contributing to advancements in construction practices.
Collaborations
Darrow has collaborated with notable individuals such as Glenn F. Rogers, Jr. and Samuel A. Face, Jr. These partnerships have fostered an environment of creativity and innovation, leading to the development of his impactful patents.
Conclusion
Darrell L. Darrow's contributions to the field of invention, particularly in concrete finishing and mixture separation, highlight his innovative spirit and dedication to improving construction technologies. His patents reflect a deep understanding of material science and a commitment to enhancing industry practices.